1423550440 has 32 divisors (see below), whose sum is σ = 3449373480. Its totient is φ = 525618432.

The previous prime is 1423550417. The next prime is 1423550483. The reversal of 1423550440 is 440553241.

It can be written as a sum of positive squares in 4 ways, for example, as 698756356 + 724794084 = 26434^2 + 26922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1423550399 and 1423550408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1368279 + ... + 1369318.

Almost surely, 2^1423550440 is an apocalyptic number.

1423550440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423550440 is an abundant number, since it is smaller than the sum of its proper divisors (2025823040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1423550440 is a wasteful number, since it uses less digits than its factorization.

1423550440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737621 (or 2737617 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1423550440 is about 37729.9673999329. The cubic root of 1423550440 is about 1124.9268601010.

The spelling of 1423550440 in words is "one billion, four hundred twenty-three million, five hundred fifty thousand, four hundred forty".